This can be effective against creature decks that dont go too wide, but with some downsides
Chevalier de Fleur X WIND Level 8 [ Warrior / SynchroEffect ] ATK 2700 DEF 2300 "Fleur Synchron" + 1+ non-Tuner monsters Once per turn, during your turn, when your opponent activates a Spell/Trap Card (Quick Effect): You can negate the activation, and if you do, destroy that card.
You cannot always get the best outcome from each scenario, and if that is going to annoy you this game might not be for you
With 24 Defenders in the deck, these cards can easily generate huge amounts of mana with their tap abilities
Booster Pack (Pokemon Fates Collide | Pokemon Cards) prices are based on the historic sales
Both raw and graded copies of Charizard ex and Mewtwo ex have continued to decline, suggesting softer demand across those segments of the market